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Volkswagen Passat B5 FWD 1.8T Cooling Expansion Tank Parts

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Coolant Expansion Tank - With Cap

ES#3189300 - 603-703 - Coolant Expansion Tank - With Cap - Includes integrated coolant level sensor - Dorman - Audi Volkswagen

Includes integrated coolant level sensor

Brand:
Dorman - Corporate Logo
ES#:
3189300
Mfg#:
603-703
Ships in 4 Business Days
$44.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Hose

ES#9528 - 8D0121107C - Expansion Tank Hose - Connects the expansion tank to the hard water pipe - Gates - Audi Volkswagen

Connects the expansion tank to the hard water pipe

Brand:
Gates - Corporate Logo
ES#:
9528
Mfg#:
8D0121107C
In Stock at Vendor
$11.52 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Hose

ES#429389 - 8D0121107C - Expansion Tank Hose - Connects the expansion tank to the hard water pipe - Genuine Volkswagen Audi - Audi Volkswagen

Connects the expansion tank to the hard water pipe

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
429389
Mfg#:
8D0121107C
Ships in 3 Business Days
11% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$37.99

This product was last offered at the strikethrough price on
08-22-2026

$33.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#2802911 - 8D0121403L - Coolant Expansion Tank - Includes integrated coolant level sensor, does not include cap - Rein - Audi Volkswagen

Includes integrated coolant level sensor, does not include cap We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2802911
Mfg#:
8D0121403L
Ships in 3 Business Days
$25.99 USD
Free Shipping
on orders $49 and up

Coolant Expansion Tank

ES#2816257 - 8D0121403L - Coolant Expansion Tank - Includes integrated coolant level sensor - Hamburg Tech - Audi Volkswagen

Includes integrated coolant level sensor We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2816257
Mfg#:
8D0121403L
Ships in 1 Business Day
$23.85 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap - Black

ES#3970169 - 5Q0121321 - Expansion Tank Cap - Black - Keep proper pressure in your coolant system - Meyle - Audi Volkswagen Porsche

Keep proper pressure in your coolant system We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
3970169
Mfg#:
5Q0121321
Ships on Sep 9, 2026
$12.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap Seal

ES#2598146 - 1H0121687A - Expansion Tank Cap Seal - Seals the expansion tank cap to the reservoir. 28.5x3.8 - Vaico - Audi Volkswagen

Seals the expansion tank cap to the reservoir. 28.5x3.8 We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
2598146
Mfg#:
1H0121687A
In Stock at Vendor
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank

ES#2814304 - 1J0121321B - Expansion Tank - Keep proper pressure in your coolant system - Hamburg Tech - Audi Volkswagen

Keep proper pressure in your coolant system We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2814304
Mfg#:
1J0121321B
Ships in 1 Business Day
$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2815697 - 3B0121321 - Expansion Tank Cap - Keep proper pressure in your coolant system - Hamburg Tech - Audi Volkswagen

Keep proper pressure in your coolant system We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2815697
Mfg#:
3B0121321
Ships in 1 Business Day
$7.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Hose

ES#2802152 - 8D0121107C - Expansion Tank Hose - Connects the expansion tank to the hard water pipe - Rein - Audi Volkswagen

Connects the expansion tank to the hard water pipe We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2802152
Mfg#:
8D0121107C
Ships in 3 Business Days
$7.63 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#3672033 - 3C0121321 - Expansion Tank Cap - Keep proper pressure in your coolant system - Stant - Audi Volkswagen Porsche

Keep proper pressure in your coolant system

Brand:
Stant - Corporate Logo
ES#:
3672033
Mfg#:
3C0121321
Back Ordered
$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Replacement Kit W/ R8 Coolant Cap

ES#2598445 - 8D0121403LR8KT - Expansion Tank Replacement Kit W/ R8 Coolant Cap - Install a brand new expansion tank with a new R8 polished aluminum cap and hardware - Assembled By ECS - Audi Volkswagen

Install a brand new expansion tank with a new R8 polished aluminum cap and hardware

Brand:
Assembled By ECS - Corporate Logo
ES#:
2598445
Mfg#:
8D0121403LR8KT
Ships in 1-2 days
$345.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Cooling Expansion Tank Parts

A common source of overheating problems is a broken or leaking coolant expansion tank. Replace it with an OEM coolant expansion tank or quality aftermarket expansion tank to prevent future woes.

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Manufacturer names and/or part numbers are used only for identification purposes.

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